Unknown CMake command "install_library_includes".

What is the definition of **install_library_includes** ???
[install_library_includes](https://github.com/Azure/umock-c/blob/master/CMakeLists.txt#L188)

```console
CMake Error at CMakeLists.txt:188 (install_library_includes):
Unknown CMake command "install_library_includes".

Configuring incomplete, errors occurred!
```

I failed to build **umock-c**

Cheers

Start at CMakeLists.txt line 188, where the unknown install_library_includes command is reported. Trace where that command is expected to be defined or included, then verify that configuring umock-c completes without the error.

Written by the indexing model from the issue text.